diff --git a/ports/aom/portfile.cmake b/ports/aom/portfile.cmake
index 75cf322c60..d6e63ba5a9 100644
--- a/ports/aom/portfile.cmake
+++ b/ports/aom/portfile.cmake
@@ -9,9 +9,15 @@ vcpkg_from_git(
         aom-fix-nasm.diff # TODO: remove this patch after the next release
 )
 
-vcpkg_find_acquire_program(NASM)
 vcpkg_find_acquire_program(PERL)
 
+if(VCPKG_TARGET_ARCHITECTURE MATCHES "^(x86|x64)$")
+    # Upstream AOM only uses NASM on x86-family targets. Non-x86 targets such as
+    # Apple Silicon configure with ENABLE_NASM=OFF and should not require nasm.
+    vcpkg_find_acquire_program(NASM)
+    set(aom_nasm_compiler "-DCMAKE_ASM_NASM_COMPILER=${NASM}")
+endif()
+
 set(aom_target_cpu "")
 if(VCPKG_TARGET_IS_UWP OR (VCPKG_TARGET_IS_WINDOWS AND VCPKG_TARGET_ARCHITECTURE MATCHES "^arm"))
     # UWP + aom's assembler files result in weirdness and build failures
@@ -33,7 +39,7 @@ vcpkg_cmake_configure(
         -DENABLE_TESTS=OFF
         -DENABLE_TOOLS=OFF
         -DTHREADS_PREFER_PTHREAD_FLAG=ON
-        "-DCMAKE_ASM_NASM_COMPILER=${NASM}"
+        ${aom_nasm_compiler}
         "-DPERL_EXECUTABLE=${PERL}"
 )
 
diff --git a/ports/aom/vcpkg.json b/ports/aom/vcpkg.json
index 8db868cb3a..a1799c0580 100644
--- a/ports/aom/vcpkg.json
+++ b/ports/aom/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "aom",
   "version-semver": "3.13.1",
-  "port-version": 1,
+  "port-version": 2,
   "description": "AV1 codec library",
   "homepage": "https://aomedia.googlesource.com/aom",
   "license": "BSD-2-Clause",
diff --git a/versions/a-/aom.json b/versions/a-/aom.json
index 50945a65cf..864e5e11c6 100644
--- a/versions/a-/aom.json
+++ b/versions/a-/aom.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "6af4ddae16c64f2cab705d49ed1055c2d99fd837",
+      "version-semver": "3.13.1",
+      "port-version": 2
+    },
     {
       "git-tree": "26fd05f1c9967caa611538c4e2f11edb8303288f",
       "version-semver": "3.13.1",
diff --git a/versions/baseline.json b/versions/baseline.json
index 3c36e53215..c72321a167 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -178,7 +178,7 @@
     },
     "aom": {
       "baseline": "3.13.1",
-      "port-version": 1
+      "port-version": 2
     },
     "apache-datasketches": {
       "baseline": "5.2.0",